They wake up screaming and don't recognise you

It isn't a nightmare — which is why nothing you do seems to work. Telling the two apart completely changes what that night calls for.

Sleep Babies and early childhood Updated 2026-09-05

A night terror is a partial waking out of deep sleep. They look awake: screaming, crying, sweating, eyes possibly open and looking straight at you. But they aren't, and they aren't aware of any of it.

It almost always happens in the first third of the night, when deep sleep is heaviest. The next day they won't remember. The one who will remember it for life is you.

Terror or nightmare: the difference matters

Night terrorNightmare
Sleep stageDeep sleepREM sleep
WhenFirst third of the nightSecond half
Are they awake?NoYes
Do they remember?NoYes
What they needYou to waitYou to comfort them

That last row is what changes the night. With a nightmare you comfort. With a terror you wait — waking them makes it worse and drags the episode out.

What to do

What not to do

When it's worth asking

Night terrors are common between ages 3 and 7 and usually resolve on their own. It's worth mentioning to your paediatrician if they happen several times a night, continue well beyond that age, involve rigid or repetitive movements, or if your child is drowsy during the day.

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Sources. General information based on guidance from the American Academy of Pediatrics (AAP), the American Academy of Sleep Medicine (AASM) and the NHS.
NomiNest is not a medical device and this guide does not replace your paediatrician's guidance. The information is general and orientative: every baby is different, and the professional who sees yours is the one who knows them.